Unchecks toolbar item or items with <span class="argument">id</span> (visually looks like pressed button).

<div class="definition">
    uncheck(id1, [id2], ...)
</div>

<div class="arguments">
    <table>
    <tr>
        <td>id</td>
        <td><b>string</b>, id of the toolbar item</td>
    </tr>
    </table>
</div>

Returns array that contains ids of effected items.

<h4>Description</h4>

The item(s) must exists in the <a class="method" href="w2toolbar.items">.items</a> array of the toolbar. The toolbar item is
identified by the <span class="property">.id</span> property. The method returns the number of unchecked items that were checked before.
<div style="height: 10px"></div>

If you have toolbar defined in the following way:
<textarea class="javascript">
let toolbar = new w2toolbar({
    name  : 'toolbar',
    items : [
        { type: 'check',  id: 'item1', text: 'Check', icon: 'icon-page', checked: true },
        { type: 'radio',  id: 'item3',  group: '1', text: 'R-1', icon: 'icon-add' },
        { type: 'radio',  id: 'item4',  group: '1', text: 'R-2', icon: 'icon-add' }
    ]
});
</textarea>

You can uncheck toolbar item:
<textarea class="javascript">
w2ui.toolbar.uncheck('item1');
</textarea>
